55315443 has 4 divisors (see below), whose sum is σ = 73753928. Its totient is φ = 36876960.

The previous prime is 55315427. The next prime is 55315451. The reversal of 55315443 is 34451355.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55315443 - 2⁴ = 55315427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55315443.

It is not an unprimeable number, because it can be changed into a prime (55315423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9219238 + ... + 9219243.

It is an arithmetic number, because the mean of its divisors is an integer number (18438482).

Almost surely, 2^55315443 is an apocalyptic number.

55315443 is a deficient number, since it is larger than the sum of its proper divisors (18438485).

55315443 is a wasteful number, since it uses less digits than its factorization.

55315443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18438484.

The product of its digits is 18000, while the sum is 30.

The square root of 55315443 is about 7437.4352434156. The cubic root of 55315443 is about 381.0208997842.

Adding to 55315443 its reverse (34451355), we get a palindrome (89766798).

The spelling of 55315443 in words is "fifty-five million, three hundred fifteen thousand, four hundred forty-three".